Carly Rae Jepsen, known best for the pop hit "Call Me Maybe," has been sued for alleged copyright infringement over another one of her songs - "Good Time."

More than 1 million copies of the latter single have been sold in the United States since it was released in June. The track is a collaboration between the 26-year-old and Adam Young, founder of the electronica music project Owl City, who is also named as a defendant in the lawsuit filed by Alabama singer and songwriter Allyson Nichole Burnett, aka Ally Burnett, in a California federal court last week.

She claims that Young and "Good Time" co-writers Matt Thiessen and Brian Lee lifted the opening motif from her 2010 track "Ah, It's A Love Song" and incorporated it into Jepsen's new single. The parties have not commented about the matter.

"Defendants' extensive access to 'Love Song' is sufficient to trigger the 'inverse ration rule,' whereby a reduced standard of proof of substantial similarity is required when a high degree of access is shown. However, the substantial similarity between the Original Motif and the Copied Motif ... is striking under any standard of proof," the lawsuit states, according to The Hollywood Reporter.

"Good Time" is the second single on Jepsen's second studio album "Kiss" and is also the lead single on Owl City's album "The Midsummer Station." In September, Jepsen released a new dance single - "This Kiss," which was co-written by LMFAO's RedFoo. Its music video debuted earlier this week.

Burnett, who once went by the stage name Ally Cupcake, also sang and co-wrote the theme song of the MTV daily show "The Seven," which debuted in 2010. She also released tracks such as "Trouble Never Looked So Good," "The (Ex) Boyfriend Song and "We Would've Broken Up Once You Heard This Song Anyway" and her music has been featured on MTV reality shows such as "Jersey Shore" and "The Hills."